CGridView
Package | zii.widgets.grid |
---|---|
Inheritance | class CGridView » CBaseListView » CWidget » CBaseController » CComponent |
Since | 1.1 |
Version | $Id: CGridView.php 3551 2012-02-02 12:45:25Z mdomba $ |
Source Code | framework/zii/widgets/grid/CGridView.php |
Each row of the table represents the data of a single data item, and a column usually represents an attribute of the item (some columns may correspond to complex expression of attributes or static text).
CGridView supports both sorting and pagination of the data items. The sorting and pagination can be done in AJAX mode or normal page request. A benefit of using CGridView is that when the user browser disables JavaScript, the sorting and pagination automatically degenerate to normal page requests and are still functioning as expected.
CGridView should be used together with a data provider, preferrably a CActiveDataProvider.
The minimal code needed to use CGridView is as follows:
$dataProvider=new CActiveDataProvider('Post'); $this->widget('zii.widgets.grid.CGridView', array( 'dataProvider'=>$dataProvider, ));
The above code first creates a data provider for the
Post
ActiveRecord class.
It then uses CGridView to display every attribute in every Post
instance.
The displayed table is equiped with sorting and pagination functionality.
In order to selectively display attributes with different formats, we may configure the CGridView::columns property. For example, we may specify only the
title
and create_time
attributes to be displayed, and the create_time
should be properly formatted to show as a time. We may also display the attributes of the related
objects using the dot-syntax as shown below:
$this->widget('zii.widgets.grid.CGridView', array( 'dataProvider'=>$dataProvider, 'columns'=>array( 'title', // display the 'title' attribute 'category.name', // display the 'name' attribute of the 'category' relation 'content:html', // display the 'content' attribute as purified HTML array( // display 'create_time' using an expression 'name'=>'create_time', 'value'=>'date("M j, Y", $data->create_time)', ), array( // display 'author.username' using an expression 'name'=>'authorName', 'value'=>'$data->author->username', ), array( // display a column with "view", "update" and "delete" buttons 'class'=>'CButtonColumn', ), ), ));
Please refer to columns for more details about how to configure this property.
Public Properties
Property | Type | Description | Defined By |
---|---|---|---|
actionPrefix | string | the prefix to the IDs of the actions. | CWidget |
afterAjaxUpdate | string | a javascript function that will be invoked after a successful AJAX response is received. | CGridView |
ajaxUpdate | mixed | the ID of the container whose content may be updated with an AJAX response. | CGridView |
ajaxUpdateError | string | a javascript function that will be invoked if an AJAX update error occurs. | CGridView |
ajaxUrl | mixed | the URL for the AJAX requests should be sent to. | CGridView |
ajaxVar | string | the name of the GET variable that indicates the request is an AJAX request triggered by this widget. | CGridView |
baseScriptUrl | string | the base script URL for all grid view resources (eg javascript, CSS file, images). | CGridView |
beforeAjaxUpdate | string | a javascript function that will be invoked before an AJAX update occurs. | CGridView |
blankDisplay | string | the text to be displayed in an empty grid cell. | CGridView |
columns | array | grid column configuration. | CGridView |
controller | CController | Returns the controller that this widget belongs to. | CWidget |
cssFile | string | the URL of the CSS file used by this grid view. | CGridView |
dataProvider | IDataProvider | the data provider for the view. | CBaseListView |
emptyText | string | the message to be displayed when dataProvider does not have any data. | CBaseListView |
enablePagination | boolean | whether to enable pagination. | CBaseListView |
enableSorting | boolean | whether to enable sorting. | CBaseListView |
filter | CModel | the model instance that keeps the user-entered filter data. | CGridView |
filterCssClass | string | the CSS class name for the table row element containing all filter input fields. | CGridView |
filterPosition | string | whether the filters should be displayed in the grid view. | CGridView |
formatter | CFormatter | the formatter instance. | CGridView |
hasFooter | boolean | whether the table should render a footer. | CGridView |
hideHeader | boolean | whether to hide the header cells of the grid. | CGridView |
htmlOptions | array | the HTML options for the view container tag. | CBaseListView |
id | string | Returns the ID of the widget or generates a new one if requested. | CWidget |
itemsCssClass | string | the CSS class name for the container of all data item display. | CBaseListView |
loadingCssClass | string | the CSS class name that will be assigned to the widget container element when the widget is updating its content via AJAX. | CGridView |
nullDisplay | string | the text to be displayed in a data cell when a data value is null. | CGridView |
owner | CBaseController | Returns the owner/creator of this widget. | CWidget |
pager | array | the configuration for the pager. | CBaseListView |
pagerCssClass | string | the CSS class name for the pager container. | CBaseListView |
rowCssClass | array | the CSS class names for the table body rows. | CGridView |
rowCssClassExpression | string | a PHP expression that is evaluated for every table body row and whose result is used as the CSS class name for the row. | CGridView |
selectableRows | integer | the number of table body rows that can be selected. | CGridView |
selectionChanged | string | a javascript function that will be invoked after the row selection is changed. | CGridView |
showTableOnEmpty | boolean | whether to display the table even when there is no data. | CGridView |
skin | mixed | the name of the skin to be used by this widget. | CWidget |
summaryCssClass | string | the CSS class name for the summary text container. | CBaseListView |
summaryText | string | the summary text template for the view. | CBaseListView |
tagName | string | the tag name for the view container. | CBaseListView |
template | string | the template to be used to control the layout of various sections in the view. | CBaseListView |
updateSelector | string | the jQuery selector of the HTML elements that may trigger AJAX updates when they are clicked. | CGridView |
viewPath | string | Returns the directory containing the view files for this widget. | CWidget |
Public Methods
Method | Description | Defined By |
---|---|---|
__call() | Calls the named method which is not a class method. | CComponent |
__construct() | Constructor. | CWidget |
__get() | Returns a property value, an event handler list or a behavior based on its name. | CComponent |
__isset() | Checks if a property value is null. | CComponent |
__set() | Sets value of a component property. | CComponent |
__unset() | Sets a component property to be null. | CComponent |
actions() | Returns a list of actions that are used by this widget. | CWidget |
asa() | Returns the named behavior object. | CComponent |
attachBehavior() | Attaches a behavior to this component. | CComponent |
attachBehaviors() | Attaches a list of behaviors to the component. | CComponent |
attachEventHandler() | Attaches an event handler to an event. | CComponent |
beginCache() | Begins fragment caching. | CBaseController |
beginClip() | Begins recording a clip. | CBaseController |
beginContent() | Begins the rendering of content that is to be decorated by the specified view. | CBaseController |
beginWidget() | Creates a widget and executes it. | CBaseController |
canGetProperty() | Determines whether a property can be read. | CComponent |
canSetProperty() | Determines whether a property can be set. | CComponent |
createWidget() | Creates a widget and initializes it. | CBaseController |
detachBehavior() | Detaches a behavior from the component. | CComponent |
detachBehaviors() | Detaches all behaviors from the component. | CComponent |
detachEventHandler() | Detaches an existing event handler. | CComponent |
disableBehavior() | Disables an attached behavior. | CComponent |
disableBehaviors() | Disables all behaviors attached to this component. | CComponent |
enableBehavior() | Enables an attached behavior. | CComponent |
enableBehaviors() | Enables all behaviors attached to this component. | CComponent |
endCache() | Ends fragment caching. | CBaseController |
endClip() | Ends recording a clip. | CBaseController |
endContent() | Ends the rendering of content. | CBaseController |
endWidget() | Ends the execution of the named widget. | CBaseController |
evaluateExpression() | Evaluates a PHP expression or callback under the context of this component. | CComponent |
getController() | Returns the controller that this widget belongs to. | CWidget |
getEventHandlers() | Returns the list of attached event handlers for an event. | CComponent |
getFormatter() | Returns the formatter instance. Defaults to the 'format' application component. | CGridView |
getHasFooter() | Returns whether the table should render a footer. This is true if any of the columns has a true CGridColumn::hasFooter value. | CGridView |
getId() | Returns the ID of the widget or generates a new one if requested. | CWidget |
getOwner() | Returns the owner/creator of this widget. | CWidget |
getViewFile() | Looks for the view script file according to the view name. | CWidget |
getViewPath() | Returns the directory containing the view files for this widget. | CWidget |
hasEvent() | Determines whether an event is defined. | CComponent |
hasEventHandler() | Checks whether the named event has attached handlers. | CComponent |
hasProperty() | Determines whether a property is defined. | CComponent |
init() | Initializes the grid view. | CGridView |
raiseEvent() | Raises an event. | CComponent |
registerClientScript() | Registers necessary client scripts. | CGridView |
render() | Renders a view. | CWidget |
renderContent() | Renders the main content of the view. | CBaseListView |
renderEmptyText() | Renders the empty message when there is no data. | CBaseListView |
renderFile() | Renders a view file. | CBaseController |
renderFilter() | Renders the filter. | CGridView |
renderInternal() | Renders a view file. | CBaseController |
renderItems() | Renders the data items for the grid view. | CGridView |
renderKeys() | Renders the key values of the data in a hidden tag. | CBaseListView |
renderPager() | Renders the pager. | CBaseListView |
renderSummary() | Renders the summary text. | CBaseListView |
renderTableBody() | Renders the table body. | CGridView |
renderTableFooter() | Renders the table footer. | CGridView |
renderTableHeader() | Renders the table header. | CGridView |
renderTableRow() | Renders a table body row. | CGridView |
run() | Renders the view. | CBaseListView |
setFormatter() | Sets the formatter instance | CGridView |
setId() | Sets the ID of the widget. | CWidget |
widget() | Creates a widget and executes it. | CBaseController |
Protected Methods
Method | Description | Defined By |
---|---|---|
createDataColumn() | Creates a CDataColumn based on a shortcut column specification string. | CGridView |
initColumns() | Creates column objects and initializes them. | CGridView |
renderSection() | Renders a section. | CBaseListView |
Property Details
a javascript function that will be invoked after a successful AJAX response is received.
The function signature is function(id, data)
where 'id' refers to the ID of the grid view,
'data' the received ajax response data.
the ID of the container whose content may be updated with an AJAX response. Defaults to null, meaning the container for this grid view instance. If it is set false, it means sorting and pagination will be performed in normal page requests instead of AJAX requests. If the sorting and pagination should trigger the update of multiple containers' content in AJAX fashion, these container IDs may be listed here (separated with comma).
a javascript function that will be invoked if an AJAX update error occurs.
The function signature is function(xhr, textStatus, errorThrown, errorMessage)
xhr
is the XMLHttpRequest object.textStatus
is a string describing the type of error that occurred. Possible values (besides null) are "timeout", "error", "notmodified" and "parsererror"errorThrown
is an optional exception object, if one occurred.errorMessage
is the CGridView default error message derived from xhr and errorThrown. Usefull if you just want to display this error differently. CGridView by default displays this error with an javascript.alert()
Example (add in a call to CGridView):
... 'ajaxUpdateError'=>'function(xhr,ts,et,err){ $("#myerrordiv").text(err); }', ...
the URL for the AJAX requests should be sent to. CHtml::normalizeUrl() will be called on this property. If not set, the current page URL will be used for AJAX requests.
the name of the GET variable that indicates the request is an AJAX request triggered by this widget. Defaults to 'ajax'. This is effective only when ajaxUpdate is not false.
the base script URL for all grid view resources (eg javascript, CSS file, images). Defaults to null, meaning using the integrated grid view resources (which are published as assets).
a javascript function that will be invoked before an AJAX update occurs.
The function signature is function(id,options)
where 'id' refers to the ID of the grid view,
'options' the AJAX request options (see jQuery.ajax api manual).
the text to be displayed in an empty grid cell. This property will NOT be HTML-encoded when rendering. Defaults to an HTML blank. This differs from nullDisplay in that nullDisplay is only used by CDataColumn to render null data values.
grid column configuration. Each array element represents the configuration
for one particular grid column which can be either a string or an array.
When a column is specified as a string, it should be in the format of "name:type:header",
where "type" and "header" are optional. A CDataColumn instance will be created in this case,
whose CDataColumn::name, CDataColumn::type and CDataColumn::header
properties will be initialized accordingly.
When a column is specified as an array, it will be used to create a grid column instance, where
the 'class' element specifies the column class name (defaults to CDataColumn if absent).
Currently, these official column classes are provided: CDataColumn,
CLinkColumn, CButtonColumn and CCheckBoxColumn.
the URL of the CSS file used by this grid view. Defaults to null, meaning using the integrated CSS file. If this is set false, you are responsible to explicitly include the necessary CSS file in your page.
the model instance that keeps the user-entered filter data. When this property is set, the grid view will enable column-based filtering. Each data column by default will display a text field at the top that users can fill in to filter the data. Note that in order to show an input field for filtering, a column must have its CDataColumn::name property set or have CDataColumn::filter as the HTML code for the input field. When this property is not set (null) the filtering is disabled.
the CSS class name for the table row element containing all filter input fields. Defaults to 'filters'.
See Also
whether the filters should be displayed in the grid view. Valid values include:
- header: the filters will be displayed on top of each column's header cell.
- body: the filters will be displayed right below each column's header cell.
- footer: the filters will be displayed below each column's footer cell.
See Also
the formatter instance. Defaults to the 'format' application component.
whether the table should render a footer. This is true if any of the columns has a true CGridColumn::hasFooter value.
whether to hide the header cells of the grid. When this is true, header cells will not be rendered, which means the grid cannot be sorted anymore since the sort links are located in the header. Defaults to false.
the CSS class name that will be assigned to the widget container element when the widget is updating its content via AJAX. Defaults to 'grid-view-loading'.
the text to be displayed in a data cell when a data value is null. This property will NOT be HTML-encoded when rendering. Defaults to an HTML blank.
the CSS class names for the table body rows. If multiple CSS class names are given,
they will be assigned to the rows sequentially and repeatedly. This property is ignored
if rowCssClassExpression is set. Defaults to array('odd', 'even')
.
See Also
a PHP expression that is evaluated for every table body row and whose result
is used as the CSS class name for the row. In this expression, the variable $row
stands for the row number (zero-based), $data
is the data model associated with
the row, and $this
is the grid object.
See Also
the number of table body rows that can be selected. If 0, it means rows cannot be selected.
If 1, only one row can be selected. If 2 or any other number, it means multiple rows can be selected.
A selected row will have a CSS class named 'selected'. You may also call the JavaScript function
$.fn.yiiGridView.getSelection(containerID)
to retrieve the key values of the selected rows.
a javascript function that will be invoked after the row selection is changed.
The function signature is function(id)
where 'id' refers to the ID of the grid view.
In this function, you may use $.fn.yiiGridView.getSelection(id)
to get the key values
of the currently selected rows.
See Also
whether to display the table even when there is no data. Defaults to true. The emptyText will be displayed to indicate there is no data.
the jQuery selector of the HTML elements that may trigger AJAX updates when they are clicked. If not set, the pagination links and the sorting links will trigger AJAX updates.
Method Details
protected CDataColumn createDataColumn(string $text)
| ||
$text | string | the column specification string |
{return} | CDataColumn | the column instance |
protected function createDataColumn($text)
{
if(!preg_match('/^([\w\.]+)(:(\w*))?(:(.*))?$/',$text,$matches))
throw new CException(Yii::t('zii','The column must be specified in the format of "Name:Type:Label", where "Type" and "Label" are optional.'));
$column=new CDataColumn($this);
$column->name=$matches[1];
if(isset($matches[3]) && $matches[3]!=='')
$column->type=$matches[3];
if(isset($matches[5]))
$column->header=$matches[5];
return $column;
}
Creates a CDataColumn based on a shortcut column specification string.
public CFormatter getFormatter()
| ||
{return} | CFormatter | the formatter instance. Defaults to the 'format' application component. |
public function getFormatter()
{
if($this->_formatter===null)
$this->_formatter=Yii::app()->format;
return $this->_formatter;
}
public boolean getHasFooter()
| ||
{return} | boolean | whether the table should render a footer. This is true if any of the columns has a true CGridColumn::hasFooter value. |
public function getHasFooter()
{
foreach($this->columns as $column)
if($column->getHasFooter())
return true;
return false;
}
public void init()
|
public function init()
{
parent::init();
if(!isset($this->htmlOptions['class']))
$this->htmlOptions['class']='grid-view';
if($this->baseScriptUrl===null)
$this->baseScriptUrl=Yii::app()->getAssetManager()->publish(Yii::getPathOfAlias('zii.widgets.assets')).'/gridview';
if($this->cssFile!==false)
{
if($this->cssFile===null)
$this->cssFile=$this->baseScriptUrl.'/styles.css';
Yii::app()->getClientScript()->registerCssFile($this->cssFile);
}
$this->initColumns();
}
Initializes the grid view. This method will initialize required property values and instantiate columns objects.
protected void initColumns()
|
protected function initColumns()
{
if($this->columns===array())
{
if($this->dataProvider instanceof CActiveDataProvider)
$this->columns=$this->dataProvider->model->attributeNames();
else if($this->dataProvider instanceof IDataProvider)
{
// use the keys of the first row of data as the default columns
$data=$this->dataProvider->getData();
if(isset($data[0]) && is_array($data[0]))
$this->columns=array_keys($data[0]);
}
}
$id=$this->getId();
foreach($this->columns as $i=>$column)
{
if(is_string($column))
$column=$this->createDataColumn($column);
else
{
if(!isset($column['class']))
$column['class']='CDataColumn';
$column=Yii::createComponent($column, $this);
}
if(!$column->visible)
{
unset($this->columns[$i]);
continue;
}
if($column->id===null)
$column->id=$id.'_c'.$i;
$this->columns[$i]=$column;
}
foreach($this->columns as $column)
$column->init();
}
Creates column objects and initializes them.
public void registerClientScript()
|
public function registerClientScript()
{
$id=$this->getId();
if($this->ajaxUpdate===false)
$ajaxUpdate=false;
else
$ajaxUpdate=array_unique(preg_split('/\s*,\s*/',$this->ajaxUpdate.','.$id,-1,PREG_SPLIT_NO_EMPTY));
$options=array(
'ajaxUpdate'=>$ajaxUpdate,
'ajaxVar'=>$this->ajaxVar,
'pagerClass'=>$this->pagerCssClass,
'loadingClass'=>$this->loadingCssClass,
'filterClass'=>$this->filterCssClass,
'tableClass'=>$this->itemsCssClass,
'selectableRows'=>$this->selectableRows,
);
if($this->ajaxUrl!==null)
$options['url']=CHtml::normalizeUrl($this->ajaxUrl);
if($this->updateSelector!==null)
$options['updateSelector']=$this->updateSelector;
if($this->enablePagination)
$options['pageVar']=$this->dataProvider->getPagination()->pageVar;
if($this->beforeAjaxUpdate!==null)
$options['beforeAjaxUpdate']=(strpos($this->beforeAjaxUpdate,'js:')!==0 ? 'js:' : '').$this->beforeAjaxUpdate;
if($this->afterAjaxUpdate!==null)
$options['afterAjaxUpdate']=(strpos($this->afterAjaxUpdate,'js:')!==0 ? 'js:' : '').$this->afterAjaxUpdate;
if($this->ajaxUpdateError!==null)
$options['ajaxUpdateError']=(strpos($this->ajaxUpdateError,'js:')!==0 ? 'js:' : '').$this->ajaxUpdateError;
if($this->selectionChanged!==null)
$options['selectionChanged']=(strpos($this->selectionChanged,'js:')!==0 ? 'js:' : '').$this->selectionChanged;
$options=CJavaScript::encode($options);
$cs=Yii::app()->getClientScript();
$cs->registerCoreScript('jquery');
$cs->registerCoreScript('bbq');
$cs->registerScriptFile($this->baseScriptUrl.'/jquery.yiigridview.js',CClientScript::POS_END);
$cs->registerScript(__CLASS__.'#'.$id,"jQuery('#$id').yiiGridView($options);");
}
Registers necessary client scripts.
public void renderFilter()
|
public function renderFilter()
{
if($this->filter!==null)
{
echo "<tr class=\"{$this->filterCssClass}\">\n";
foreach($this->columns as $column)
$column->renderFilterCell();
echo "</tr>\n";
}
}
Renders the filter.
public void renderItems()
|
public function renderItems()
{
if($this->dataProvider->getItemCount()>0 || $this->showTableOnEmpty)
{
echo "<table class=\"{$this->itemsCssClass}\">\n";
$this->renderTableHeader();
ob_start();
$this->renderTableBody();
$body=ob_get_clean();
$this->renderTableFooter();
echo $body; // TFOOT must appear before TBODY according to the standard.
echo "</table>";
}
else
$this->renderEmptyText();
}
Renders the data items for the grid view.
public void renderTableBody()
|
public function renderTableBody()
{
$data=$this->dataProvider->getData();
$n=count($data);
echo "<tbody>\n";
if($n>0)
{
for($row=0;$row<$n;++$row)
$this->renderTableRow($row);
}
else
{
echo '<tr><td colspan="'.count($this->columns).'">';
$this->renderEmptyText();
echo "</td></tr>\n";
}
echo "</tbody>\n";
}
Renders the table body.
public void renderTableFooter()
|
public function renderTableFooter()
{
$hasFilter=$this->filter!==null && $this->filterPosition===self::FILTER_POS_FOOTER;
$hasFooter=$this->getHasFooter();
if($hasFilter || $hasFooter)
{
echo "<tfoot>\n";
if($hasFooter)
{
echo "<tr>\n";
foreach($this->columns as $column)
$column->renderFooterCell();
echo "</tr>\n";
}
if($hasFilter)
$this->renderFilter();
echo "</tfoot>\n";
}
}
Renders the table footer.
public void renderTableHeader()
|
public function renderTableHeader()
{
if(!$this->hideHeader)
{
echo "<thead>\n";
if($this->filterPosition===self::FILTER_POS_HEADER)
$this->renderFilter();
echo "<tr>\n";
foreach($this->columns as $column)
$column->renderHeaderCell();
echo "</tr>\n";
if($this->filterPosition===self::FILTER_POS_BODY)
$this->renderFilter();
echo "</thead>\n";
}
else if($this->filter!==null && ($this->filterPosition===self::FILTER_POS_HEADER || $this->filterPosition===self::FILTER_POS_BODY))
{
echo "<thead>\n";
$this->renderFilter();
echo "</thead>\n";
}
}
Renders the table header.
public void renderTableRow(integer $row)
| ||
$row | integer | the row number (zero-based). |
public function renderTableRow($row)
{
if($this->rowCssClassExpression!==null)
{
$data=$this->dataProvider->data[$row];
echo '<tr class="'.$this->evaluateExpression($this->rowCssClassExpression,array('row'=>$row,'data'=>$data)).'">';
}
else if(is_array($this->rowCssClass) && ($n=count($this->rowCssClass))>0)
echo '<tr class="'.$this->rowCssClass[$row%$n].'">';
else
echo '<tr>';
foreach($this->columns as $column)
$column->renderDataCell($row);
echo "</tr>\n";
}
Renders a table body row.
public void setFormatter(CFormatter $value)
| ||
$value | CFormatter | the formatter instance |
public function setFormatter($value)
{
$this->_formatter=$value;
}